public NRefactoryResolver(IProjectContent projectContent, LanguageProperties languageProperties)
{
if (projectContent == null)
{
throw new ArgumentNullException("projectContent");
}
if (languageProperties == null)
{
throw new ArgumentNullException("languageProperties");
}
this.languageProperties = languageProperties;
this.projectContent = projectContent;
if (languageProperties is LanguageProperties.CSharpProperties)
{
language = NR.SupportedLanguage.CSharp;
}
else if (languageProperties is LanguageProperties.VBNetProperties)
{
language = NR.SupportedLanguage.VBNet;
}
else
{
throw new NotSupportedException("The language " + languageProperties.ToString() + " is not supported in the resolver");
}
}
private NRefactoryRefactoringProvider(NR.SupportedLanguage language)
{
this.language = language;
}
/// <summary>
/// Creates a new class containing only the specified member.
/// This is useful because we only want to parse current method for local variables,
/// as all fields etc. are already prepared in the AST.
/// </summary>
public static TextReader ExtractMethod(string fileContent, IMember member,
NR.SupportedLanguage language, int caretLine)
{
// As the parse information is always some seconds old, the end line could be wrong
// if the user just inserted a line in the method.
// We can ignore that case because it is sufficient for the parser when the first part of the
// method body is ok.
// Since we are operating directly on the edited buffer, the parser might not be
// able to resolve invalid declarations.
// We can ignore even that because the 'invalid line' is the line the user is currently
// editing, and the declarations he is using are always above that line.
// The ExtractMethod-approach has the advantage that the method contents do not have
// do be parsed and stored in memory before they are needed.
// Previous SharpDevelop versions always stored the SharpRefactory[VB] parse tree as 'Tag'
// to the AST CompilationUnit.
// This approach doesn't need that, so one could even go and implement a special parser
// mode that does not parse the method bodies for the normal run (in the ParserUpdateThread or
// SolutionLoadThread). That could improve the parser's speed dramatically.
if (member.Region.IsEmpty)
{
return(null);
}
int startLine = member.Region.BeginLine;
if (startLine < 1)
{
return(null);
}
DomRegion bodyRegion;
if (member is IMethodOrProperty)
{
bodyRegion = ((IMethodOrProperty)member).BodyRegion;
}
else if (member is IEvent)
{
bodyRegion = ((IEvent)member).BodyRegion;
}
else
{
return(null);
}
if (bodyRegion.IsEmpty)
{
return(null);
}
int endLine = bodyRegion.EndLine;
// Fix for SD2-511 (Code completion in inserted line)
if (language == NR.SupportedLanguage.CSharp)
{
// Do not do this for VB: the parser does not correct create the
// ForEachStatement when the method in truncated in the middle
// VB does not have the "inserted line looks like variable declaration"-problem
// anyways.
if (caretLine > startLine && caretLine < endLine)
{
endLine = caretLine;
}
}
int offset = 0;
for (int i = 0; i < startLine - 1; ++i) // -1 because the startLine must be included
{
offset = fileContent.IndexOf('\n', offset) + 1;
if (offset <= 0)
{
return(null);
}
}
int startOffset = offset;
for (int i = startLine - 1; i < endLine; ++i)
{
int newOffset = fileContent.IndexOf('\n', offset) + 1;
if (newOffset <= 0)
{
break;
}
offset = newOffset;
}
int length = offset - startOffset;
string classDecl, endClassDecl;
if (language == NR.SupportedLanguage.VBNet)
{
classDecl = "Class A";
endClassDecl = "End Class\n";
}
else
{
classDecl = "class A {";
endClassDecl = "}\n";
}
System.Text.StringBuilder b = new System.Text.StringBuilder(classDecl, length + classDecl.Length + endClassDecl.Length + startLine - 1);
b.Append('\n', startLine - 1);
b.Append(fileContent, startOffset, length);
b.Append(endClassDecl);
return(new System.IO.StringReader(b.ToString()));
}
